body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #cfcfcf;
  color: #6397d6;
}
header {
  background-color: #6397d6;
  color: #0b5ba2;
  padding: 1em 0;
  text-align: center;
}
nav {
  background-color: #0b5ba2;
  color: #cfcfcf;
  padding: 0.5em 0;
  text-align: center;
}
nav a {
  color: #93bfec;
  text-decoration: none;
  padding: 0 1em;
}
nav a:hover {
  text-decoration: underline;
}
.container {
  width: 80%;
  margin: 20px auto;
  background-color: #eeeeee;
  padding: 20px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
footer {
  text-align: center;
  padding: 1em 0;
  background-color: #eeeeee;
  color: #6397d6;
  position: relative;
  bottom: 0;
  width: 100%;
}